配置全局日期和时间格式

Hunyuan 7b 中英对照 Configuring a Global Date and Time Format

默认情况下，未使用@DateTimeFormat标注的日期和时间字段会使用DateFormat.SHORT格式从字符串进行转换。如果您愿意，可以通过定义自己的全局格式来更改这一设置。

为此，请确保Spring不会注册默认的格式化器。相反，需要借助以下方法手动注册格式化器：

• org.springframework.format.datetime.StandardDateTimeFormatter Registrar

• org.springframework.format.datetime.DateFormatterRegistrar

例如，以下配置注册了一个全局的 yyyyMMdd 格式：

Java

@Configuration
public class ApplicationConfiguration {

	@Bean
	public FormattingConversionService conversionService() {

		// Use the DefaultFormattingConversionService but do not register defaults
		DefaultFormattingConversionService conversionService =
				new DefaultFormattingConversionService(false);

		// Ensure @NumberFormat is still supported
		conversionService.addFormatterForFieldAnnotation(
				new NumberFormatAnnotationFormatterFactory());

		// Register JSR-310 date conversion with a specific global format
		DateTimeFormatterRegistrar dateTimeRegistrar = new DateTimeFormatterRegistrar();
		dateTimeRegistrar.setDateFormatter(DateTimeFormatter.ofPattern("yyyyMMdd"));
		dateTimeRegistrar.registerFormatters(conversionService);

		// Register date conversion with a specific global format
		DateFormatterRegistrar dateRegistrar = new DateFormatterRegistrar();
		dateRegistrar.setFormatter(new DateFormatter("yyyyMMdd"));
		dateRegistrar.registerFormatters(conversionService);

		return conversionService;
	}
}

Kotlin

@Configuration
class ApplicationConfiguration {

	@Bean
	fun conversionService(): FormattingConversionService {
		// Use the DefaultFormattingConversionService but do not register defaults
		return DefaultFormattingConversionService(false).apply {

			// Ensure @NumberFormat is still supported
			addFormatterForFieldAnnotation(NumberFormatAnnotationFormatterFactory())

			// Register JSR-310 date conversion with a specific global format
			val dateTimeRegistrar = DateTimeFormatterRegistrar()
			dateTimeRegistrar.setDateFormatter(DateTimeFormatter.ofPattern("yyyyMMdd"))
			dateTimeRegistrar.registerFormatters(this)

			// Register date conversion with a specific global format
			val dateRegistrar = DateFormatterRegistrar()
			dateRegistrar.setFormatter(DateFormatter("yyyyMMdd"))
			dateRegistrar.registerFormatters(this)
		}
	}
}

Xml

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
	<property name="registerDefaultFormatters" value="false" />
	<property name="formatters">
		<set>
			<bean class="org.springframework.format.number.NumberFormatAnnotationFormatterFactory" />
		</set>
	</property>
	<property name="formatterRegistrars">
		<set>
			<bean class="org.springframework.format.datetime.standard.DateTimeFormatterRegistrar">
				<property name="dateFormatter">
					<bean class="org.springframework.format.datetime.standard.DateTimeFormatterFactoryBean">
						<property name="pattern" value="yyyyMMdd"/>
					</bean>
				</property>
			</bean>
		</set>
	</property>
</bean>

请注意，在Web应用程序中配置日期和时间格式时需要额外考虑一些因素。请参阅WebMVC转换与格式化或WebFlux转换与格式化。